I tried to create a new Instance Profile in the default client 001, got some warnings and errors that some entries were not recognised (including 'login/no_automatic_user_sapstar') however managed to save the changes. Now when trying to execute the transaction RZ10 again, i get the error message "Unkown error calling profile editor. Is there a way to fix this problem is so please let me know how. Please note this a personal system and i happen to be the 'basis team' so please assist.